function calculateTips(mealPrice, customTip) {
  const price = Number(mealPrice.slice(1));
  const price15 = "$" + (price * 0.15).toFixed(2);
  const price20 = "$" + (price * 0.2).toFixed(2);
  const priceCustom = "$" + (price * customTip.slice(0, -1) *0.01).toFixed(2);
  return [price15, price20, priceCustom];
}


let output = calculateTips("$10.00", "25%");
console.log(output);